Bad news for miners - China's big-spending days are over

China's slowdown has arrived. This morning, we learned that China's economy grew by 7.4% in the third-quarter of 2012, compared to the same time last year. That's the seventh quarter in a row that the pace of growth has slowed. And it's the slowest growth seen since the first quarter of 2009 (back when the global financial system was imploding). Yet China's leaders don't seem to be panicking. There's a very good reason for that. And as I'll explain in a moment, this lack of panic could be very bad news for anyone betting on a huge commodities rebound...